package com.xfcy.content.service.jobhandler;

import com.xfcy.base.exeption.XfcyException;
import com.xfcy.content.feign.SearchServiceClient;
import com.xfcy.content.mapper.CoursePublishMapper;
import com.xfcy.content.model.dto.CoursePreviewDto;
import com.xfcy.content.model.po.CourseIndex;
import com.xfcy.content.model.po.CoursePublish;
import com.xfcy.content.service.CoursePublishService;
import com.xfcy.messagesdk.model.po.MqMessage;
import com.xfcy.messagesdk.service.MessageProcessAbstract;
import com.xfcy.messagesdk.service.MqMessageService;
import com.xxl.job.core.context.XxlJobHelper;
import com.xxl.job.core.handler.annotation.XxlJob;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.io.File;
import java.util.concurrent.TimeUnit;

/**
 * @author 晓风残月Lx
 * @date 2023/7/2 9:04
 *      课程发布的任务类
 */
@Slf4j
@Component
public class CoursePublishTask extends MessageProcessAbstract {

    @Autowired
    CoursePublishService coursePublishService;
    @Autowired
    CoursePublishMapper coursePublishMapper;
    @Autowired
    SearchServiceClient searchServiceClient;

    // 任务调度入口
    @XxlJob("CoursePublishJobHandler")
    public void coursePublishJobHandler() throws Exception {

        // 分片参数
        int shardIndex = XxlJobHelper.getShardIndex(); // 执行器的序号，从0开始
        int shardTotal = XxlJobHelper.getShardTotal(); // 执行器总数

        // 调用抽象类的方法执行任务
        process(shardIndex, shardTotal, "course_publish", 30, 60);
    }

    // 执行课程发布任务的逻辑,如果抛出异常则说明任务执行失败
    @Override
    public boolean execute(MqMessage mqMessage) {

        // 从mqMessage拿到课程id
        Long courseId = Long.valueOf(mqMessage.getBusinessKey1());

        // 课程静态化上传到minio
        generateCourseHtml(mqMessage, courseId);

        // 向elasticsearch写索引数据
        saveCourseIndex(mqMessage, courseId);

        // 向redis写缓存
        saveCourseCache(mqMessage,courseId);

        // 返回true表示任务完成
        return true;
    }

    // 生成课程静态化页面并上传到文件系统
    private void generateCourseHtml(MqMessage mqMessage, Long courseId) {

        // 消息id
        Long taskId = mqMessage.getId();
        MqMessageService mqMessageService = this.getMqMessageService();

        // 做任务幂等性处理
        // 获取该阶段执行状态
        int stageOne = mqMessageService.getStageOne(taskId);
        if (stageOne > 0) {
            // 不处理
            log.debug("课程静态化任务完成，无需处理");
            return;
        }

        // 开始进行课程静态化，生成html页面
        File file = coursePublishService.generateCourseHtml(courseId);
        if (file == null) {
            XfcyException.cast("生成的静态页面为空");
        }

        // 将html上传到minio
        coursePublishService.uploadCourseHtml(courseId, file);

        // 任务处理完成后写任务状态为完成
        mqMessageService.completedStageOne(taskId);

    }


    // 保存课程索引信息  第二个阶段任务
    private void saveCourseIndex(MqMessage mqMessage, long courseId) {
        // 任务id
        Long taskId = mqMessage.getId();
        MqMessageService mqMessageService = this.getMqMessageService();

        // 取出第二个阶段状态
        int stageTwo = mqMessageService.getStageTwo(taskId);

        // 任务幂等性处理
        if (stageTwo > 0) {
            log.debug("课程索引信息已写入，无需执行...");
            return;
        }
        // 查询课程信息，调用搜索服务添加索引 ...
        CoursePublish coursePublish = coursePublishMapper.selectById(courseId);
        CourseIndex courseIndex = new CourseIndex();
        BeanUtils.copyProperties(coursePublish, courseIndex);
        // 远程调用
        Boolean add = searchServiceClient.add(courseIndex);
        if (!add) {
            XfcyException.cast("远程调用搜索服务添加课程索引失败");
        }

        // 完成本阶段任务
        mqMessageService.completedStageTwo(taskId);
    }

    //将课程信息缓存至redis
    public void saveCourseCache(MqMessage mqMessage,long courseId){
        // TODO redis
        log.debug("将课程信息缓存至redis,课程id:{}",courseId);
        try {
            TimeUnit.SECONDS.sleep(2);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
    }



}
